The carrier wars are heating up. Last week, T-Mobile unveiled the next phase of its “Un-carrier” strategy with a fresh take on phone upgrades, giving subscribers the ability to trade in their devices up to twice a year. A day after T-Mobile’s announcement, Sprint launched a new wireless plan that guarantees subscribers will receive unlimited Internet data, an attack on AT&T and Verizon, which have dropped unlimited plans. This week, it’s AT&T’s turn. The carrier has scheduled an announcement for Tuesday, teasing it with the line, “Get ready for what’s next in wireless.” Andy Vuong, The Denver Post

In a letter to Ajit V. Pai, the Federal Communications Commission Chairman who proposed the rollback, U.S. Rep Mike Coffman from Colorado said that altering the rules “may well have significant unanticipated negative consequences.” He asked Pai to let Congress hold hearings on the issue and pass open Internet laws.